Developing Composition Or Product Patents (Class 430/105)
  • Patent number: 10875938
    Abstract: This invention is to improve the reaction efficiency of a peroxide introduced into a cylinder compared with conventional art. In the peroxide reaction method and peroxide reaction device using an extruder according to this invention, in which a peroxide and a raw material such as a synthetic resin, a natural resin, and an elastomer are introduced into a cylinder of the extruder, wherein the raw material and the peroxide are reacted with each other in the cylinder, the raw material is introduced from a raw material supply hopper, the peroxide is introduced from a downstream side of the raw material supply hopper, and the temperature of the raw material in a peroxide introduction portion is adjusted to a temperature lower than the one-minute half-life temperature of the peroxide.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: December 29, 2020
    Assignee: THE JAPAN STEEL WORKS, LTD.
    Inventors: Makoto Ishikawa, Seiji Takamoto, Kyohei Yata, Mitsuhiro Seo
  • Patent number: 10745283
    Abstract: A method for producing an additive for reclaiming oil from a fluid product stream and a treated silica with controlled hydrophobicity for use in the method are disclosed. The method includes the steps of providing silica or silicate with a particle size of between 3.0 ?m to 20 ?m, the silica or silicates having an agglomerate size of between 10 ?m to 100 ?m and being chosen to achieve the desired particle-size range and with a controlled level of hydrophobicity; treating the silica or silicate with a silicone or silane to make it hydrophobic; and controlling the hydrophobicity of the silica or silicate by varying the temperature and treatment time of the silica or silicate, amount of a treating material used to treat the silica or silicate, and the molecular weight of the treating material. The additive and related method improves oil extraction and concentration from a fluid product stream.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: August 18, 2020
    Assignee: Applied Material Solutions, Inc.
    Inventors: Michael T. Jennings, Robert Wilson
  • Patent number: 10719022
    Abstract: An electrostatic charge image developing toner has a surface property index value represented by Formula S of 2.0 to 2.8, an electrostatic charge image developing toner has a surface property index value represented by Formula S of more than 2.8 and 3.5 or less, and an electrostatic charge image developing toner has a surface property index value represented by Formula S of more than 1.0 and less than 2.0 and a calculated value of a specific surface area in Formula S of 0.70 to 1.3: (Surface property index value)=(Measured value of specific surface area)/(Calculated value of specific surface area)??Formula S wherein (Calculated value of specific surface area)=(Sum of surface areas calculated from equivalent circle diameters of 4,500 toner particles in flow particle image analysis)/{(Specific gravity of toner)×(Sum of volumes calculated from equivalent circle diameters of 4,500 toner particles in flow particle image analysis)}.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: July 21, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuo Kadokura, Atsushi Sugawara, Daisuke Tomita, Sakiko Hirai, Satoshi Miura, Akira Matsumoto
  • Patent number: 10712680
    Abstract: A white toner for electrostatic image development includes toner particles containing a binder resin, which contains at least a crystalline polyester resin and an amorphous polyester resin, and a white pigment. The loss tangent tan ? at 30° C. determined by dynamic viscoelasticity measurement is 0.2 or more and 1.0 or less.
    Type: Grant
    Filed: June 1, 2018
    Date of Patent: July 14, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kana Yoshida, Shinya Sakamoto
  • Patent number: 10711097
    Abstract: A polylactide derivative according to the present invention is expressed by the following general formula (1) or general formula (2): In general formula (1), one of X1-X5 is an aldehyde group, one of the other four is an alkoxy group, and the other three are hydrogen atoms. In general formula (2), one of R1-R3 is selected from a chlorine atom, fluorine atom, aldehyde group, alkoxy group, alkyl group and ester, while the other two are selected from the chlorine atom, fluorine atom, aldehyde group, alkoxy group, alkyl group, ester, and hydrogen atom.
    Type: Grant
    Filed: July 14, 2016
    Date of Patent: July 14, 2020
    Assignee: NATIONAL UNIVERSITY CORPORATION NARA INSTITUTE OF SCIENCE AND TECHNOLOGY
    Inventors: Hiroharu Ajiro, Kai Kan, Mitsuru Akashi
  • Patent number: 10705442
    Abstract: The present disclosure relates to toner compositions containing a high loading of white colorant of greater than 30 weight % by weight of the toner and processes thereof. The toner exhibits a lightness (L*) of at least 75.
    Type: Grant
    Filed: August 3, 2016
    Date of Patent: July 7, 2020
    Assignee: XEROX CORPORATION
    Inventors: Karen A. Moffat, David J. W. Lawton, Melanie L. Davis, Juan A. Morales-Tirado, Varun Sambhy
  • Patent number: 10698329
    Abstract: Provided is an electrostatic charge image developer containing toner particles and carrier particles, wherein the toner particles contain at least silica particles or alumina particles as an external additive; the carrier particles contain core material particles and a coating resin layer covering a surface of the core particles; the coating resin layer contains metal oxide particles; an element measured by XPS (photoelectron spectroscopy) of the carrier particle is at least Si or Al; and a content of Si or Al in the carrier particle is in the range of 1 to 6 at % with respect to the total elements constituting the carrier particles.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: June 30, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Futoshi Kadonome, Keiji Arai, Junichi Furukawa, Ikuko Sakurada
  • Patent number: 10691035
    Abstract: A brilliant toner includes a first toner which contains a first toner particle containing a flake-shape brilliant pigment; and a second toner which contains a second toner particle containing a flake-shape brilliant pigment, and has a different color from that of the first toner, and an electrostatic charge image developing toner includes a first toner which contains a first toner particle; and a second toner which has a different color from that of the first toner, and contains the second toner particle, in which, based on a charge distribution of each of the first toner and the second toner obtained according to a charge spectrograph method, maximum peak positions of the first toner and the second toner are taken as P1 and P2, respectively, and full widths at half maximum of the first toner and the second toner are taken as W1 and W2, respectively, |P1?P2| is 3 mm or less, and |W1?W2| is 3 mm or less.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: June 23, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Satomi Hara, Masaru Takahashi, Yukiaki Nakamura, Sakiko Takeuchi
  • Patent number: 10655025
    Abstract: A process for producing unsaturated polyester microparticles comprising: melt-mixing an unsaturated polyester and an oil in an extruder; washing the microparticles with an organic solvent to reduce the amount of oil; and removing the organic solvent to form the microparticles.
    Type: Grant
    Filed: May 17, 2018
    Date of Patent: May 19, 2020
    Assignee: XEROX CORPORATION
    Inventors: Valerie M. Farrugia, Michael S. Hawkins, Guerino G. Sacripante, Edward G. Zwartz
  • Patent number: 10620556
    Abstract: A toner having chargeability and fluidity that do not change to a great extent is provided. The toner includes toner particles containing a binder resin and includes inorganic fine particles A, wherein the shape factor SF-2 of primary particles of the inorganic fine particles A is 116 or less, and regarding the particle size distribution on a volume basis of the inorganic fine particles A on the toner particle surfaces, the particle diameter when a cumulative value from the small particle side reaches 16% by volume is denoted as D16, the particle diameter when a cumulative value reaches 50% by volume is denoted as D50, and the particle diameter when a cumulative value reaches 84% by volume is denoted as D84, D50 is 80 nm or more and 200 nm or less, and the particle size distribution indicator A represented by D84/D16 is 1.70 or more and 2.60 or less.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: April 14, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nozomu Komatsu, Masayuki Hama, Takeshi Hashimoto, Ichiro Kanno, Yuto Onozaki, Megumi Ikeda, Akifumi Matsubara, Hitoshi Sano, Takakuni Kobori, Hiroyuki Fujikawa
  • Patent number: 10599058
    Abstract: A toner comprising a binder resin is provided. When the toner is observed with an atomic force microscope in tapping mode to obtain a phase image and the phase image is binarized with an intermediate value between maximum and minimum phase difference values in the phase image to obtain a binarized image, the binarized image consists of first phase-contrast portions having a large phase difference and second phase-contrast portions having a small phase difference, where the first phase-contrast portions are dispersed in the second phase-contrast portions and a dispersion diameter of the first phase-contrast portions is in a range of from 150 to 500 nm. The toner has at least two glass transition temperatures (Tg) in respective ranges of from 40° C. to 65° C. and from ?30° C. to 20° C., determined from a DSC curve obtained at a first temperature rise in a differential scanning calorimetric measurement by a midpoint method.
    Type: Grant
    Filed: January 3, 2019
    Date of Patent: March 24, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Taichi Nemoto, Toma Takebayashi
  • Patent number: 10591830
    Abstract: In an image forming method, a black toner and a color toner other than the black toner are used. The black toner and the color toner each include a binder resin including a polyester resin as a main component and a vinyl resin, a releasing agent, and an external additive. A content Vk % by mass of the vinyl resin relative to total mass of the binder resin included in the black toner, a content Vc % by mass of the vinyl resin relative to total mass of the binder resin included in the color toner, a content Wk % by mass of the releasing agent relative to the total mass of the binder resin included in the black toner, and a content Wc % by mass of the releasing agent relative to the total mass of the binder resin included in the color toner satisfy a specific relationship.
    Type: Grant
    Filed: September 12, 2018
    Date of Patent: March 17, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kaori Matsushima, Tomoko Mine, Hitomi Motani
  • Patent number: 10578988
    Abstract: A toner, where a diffraction peak of the toner as measured by X-ray diffraction spectroscopy is present at least in a region where 2? is from 20° through 25°, and a difference between Tg1 and Tg2 is 10° C. or less, where Tg1 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of a differential scanning calorimeter (DSC) under the heating and cooling conditions 1 defined in the specification, and Tg2 is a glass transition temperature of the toner, as observed in a last heating step, when heating and cooling are performed on the toner by means of the differential scanning calorimeter (DSC) under the heating and cooling conditions 2 defined in the specification.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: March 3, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshitaka Yamauchi, Kazumi Suzuki, Hisashi Nakajima, Saori Yamada, Yu Naito, Akihiro Kaneko
  • Patent number: 10488772
    Abstract: An electrostatic-image developing toner contains toner particles containing a polycondensate resin and hydrophobic external additive particles having a volume average particle size of about 40 to about 200 nm. The electrostatic-image developing toner has a difference between a half-fall temperature T1/2A and a half-fall temperature T1/2B of about 2.0° C. to about 10° C. The half-fall temperature T1/2A is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 16.5 g/m3 for 2 hours. The half-fall temperature T1/2B is measured with a flow tester after storage in an environment at 50° C. and an absolute humidity of 82.7 g/m3 for 2 hours.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: November 26, 2019
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shinichi Yaoi, Asafumi Fujita, Yasushige Nakamura, Seijiro Ishimaru
  • Patent number: 10474047
    Abstract: Provided here are toner sets and image forming apparatus and methods for the formation of a bright image with excellent brightness and concealability. A toner set according to an embodiment comprises a first toner which is stored in a first container and comprises a plurality of first toner particles containing a first bright pigment and a first binder resin, and a second toner which is stored in a second container and comprises a plurality of second toner particles containing a second bright pigment and a second binder resin, wherein the second toner has a larger volume average particle diameter than the first toner.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: November 12, 2019
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Li Xu, Maiko Miyoshi, Taishi Takano
  • Patent number: 10394152
    Abstract: A toner includes an external additive particle that is a complex oxide containing a titanium dioxide (TiO2) and a silicon dioxide (SiO2). A detection amount of titanium (Ti) detected through an elementary analysis based on energy-dispersive X-ray spectrometry is equal to or higher than about 0.590 percent by weight and equal to or lower than about 0.967 percent by weight.
    Type: Grant
    Filed: April 10, 2018
    Date of Patent: August 27, 2019
    Assignee: Oki Data Corporation
    Inventor: Satoru Murai
  • Patent number: 10386763
    Abstract: The present disclosure provides an electrophotographic member having an elastic layer containing graphite particles dispersed in a silicone rubber and having a high thermal conductivity in the thickness direction. The electrophotographic member includes a substrate and an elastic layer on the substrate, the elastic layer containing a cured product of an addition-curable liquid silicone rubber mixture including an addition-curable liquid silicone rubber and graphite particles, and the graphite particles having a DBP oil absorption number of 40 cm3/100 g or more and lower than 80 cm3/100 g.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: August 20, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Katsuya Abe, Katsuhisa Matsunaka
  • Patent number: 10344156
    Abstract: The present invention provides an aqueous dispersion mixture comprising; an aqueous dispersion (A) that comprises a crystalline polyolefin (a) as a dispersoid thereof; an aqueous dispersion (B) that comprises a crystalline polyurethane (b) as a dispersoid thereof; and an aqueous dispersion (C) that comprises a non-crystalline polyurethane (c) as a dispersoid thereof, wherein the crystalline polyolefin (a) is a non-chlorine modified polyolefin, wherein the crystalline polyurethane (b) has a crystal melting heat amount equal to or larger than 3 J/g measured by differential scanning calorimetry, wherein the non-crystalline polyurethane (c) has a crystal melting heat amount smaller than 3 J/g measured by differential scanning calorimetry, and wherein the aqueous dispersion (B) comprises a non-volatile content of 30 parts by mass to 100 parts by mass and the aqueous dispersion (C) comprises a non-volatile content of 20 parts by mass to 80 parts by mass, relative to a non-volatile content of 100 parts by mass of th
    Type: Grant
    Filed: May 13, 2016
    Date of Patent: July 9, 2019
    Assignees: SUMITOMO CHEMICAL COMPANY, LIMITED, COVESTRO DEUTSCHLAND AG
    Inventors: Hideto Nakajima, Hiroshi Morita, Hiroyuki Higashimoto
  • Patent number: 10303072
    Abstract: A toner is provided. The toner contains a polyester resin. The toner has a glass transition temperature (Tg1st) at first temperature rising of differential scanning calorimetry (DSC) of from 45° C. to 65° C. The toner includes a component insoluble in tetrahydrofuran (THF) having two glass transition temperatures (Tga1st and Tgb1st) at the first temperature rising of DSC, where Tga1st is in a range of ?45° C. to 5° C. and Tgb1st is in a range of 45° C. to 70° C. The toner includes a component soluble in THF having a glass transition temperature (Tg2nd) at second temperature rising of DSC of from 40° C. to 65° C.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: May 28, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Tanaka, Hiroyuki Takeda, Junichi Awamura, Hiroshi Yamada, Daichi Hisakuni, Yasuo Kamada
  • Patent number: 10268147
    Abstract: The present disclosure provides an electrophotographic member having an elastic layer containing graphite particles dispersed in a silicone rubber and having a high thermal conductivity in the thickness direction. The electrophotographic member includes a substrate and an elastic layer on the substrate, the elastic layer containing a cured product of an addition-curable liquid silicone rubber mixture including an addition-curable liquid silicone rubber and graphite particles, and the graphite particles having a DBP oil absorption number of 40 cm3/100 g or more and lower than 80 cm3/100 g.
    Type: Grant
    Filed: January 23, 2018
    Date of Patent: April 23, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Katsuya Abe, Katsuhisa Matsunaka
  • Patent number: 10234778
    Abstract: An electrostatic charge image developing toner includes toner particles including a particulate toner matrix and an external additive adhering to a surface of the particulate toner matrix. The particulate toner matrix includes a crystalline polyester resin. The external additive includes silica particles. The silica particles are secondary particles including primary particles having a diameter in the range of 30 to 90 nm. The secondary particles have an average circularity in the range of 0.25 to 0.50. The secondary particles have an average aspect ratio of 3.0 or more.
    Type: Grant
    Filed: September 8, 2017
    Date of Patent: March 19, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Satoshi Uchino, Shinya Obara, Junya Ueda, Takuya Takahashi
  • Patent number: 10222717
    Abstract: The invention relates to a hydrophobic silica powder which is unprecedentedly insensitive to environmental humidity with which electrophotographic toner can possess stable electro static charge that leads to stable quality of printed image. The hydrophobic silica powder has the following physicochemical properties; average primary particle size (D) is 30-2000 nm, B*D<430 nm, while B stands for weight % of adsorbed water vapor on silica (100 weight %) when the partial pressure of water to the equilibrium vapor pressure of water at 25° C. is 80% and D stands for average primary particle size (nm) of the silica powder, B/C<2.7, while C stands for weight % of adsorbed water vapor on silica (100 weight %) when the partial pressure of water to the equilibrium vapor pressure of water at 25° C. is 20%, and carbon content>0.30 wt.-%.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: March 5, 2019
    Assignee: Evonik Degussa GmbH
    Inventors: Masanobu Kaneeda, Rainer Lamann, Jens Peltzer, Farideh Yamchi, Jürgen Behnisch
  • Patent number: 10216107
    Abstract: Provided is a toner having a toner particle that contains a binder resin and a wax, wherein the solubility parameter SP of the binder resin is at least 9.4 and not more than 10.0; the binder resin contains a resin having a structure represented by the following formula (1) in the terminal position on a main chain of the resin, *—CO—R??formula (1) (in formula (1), R represents a phenyl group or a derivative thereof, or —COOR1, R1 represents an alkyl group having 1 to 4 carbons, and * represents a bond to the main chain of the resin); the solubility parameter SW of the wax is at least 8.1 and not more than 9.0; and SP and SW satisfy formula (2), |SP?SW|>0.5??formula (2).
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: February 26, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Keiichiro Tsubaki, Naoya Isono, Yasuaki Murai, Masao Suzuki
  • Patent number: 10160064
    Abstract: A purpose of the present invention is to provide a flux having an improved cleaning property by suppressing a carbonization of a flux residue. A flux contains an organic acid, a thixotropic agent, rosin and a solvent wherein a fatty acid monoalkylol amide having 14-20 carbon atoms is contained as the thixotropic agent. The fatty acid monoethanol amide is added in an amount of 3-10% by weight as the thixotropic agent. In addition, a dicarboxylic acid having 10 or less carbon atoms is added in an amount of 4-10% by weight as the organic acid. Moreover, the solvent is added in an amount of 30-60% by weight.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: December 25, 2018
    Assignee: Senju Metal Industry Co., Ltd.
    Inventors: Hideki Mori, Kazuya Kitazawa
  • Patent number: 10156802
    Abstract: A toner includes a binder resin; and a plate-shaped pigment having a silica coated layer on the surface, an average-particle diameter of from 10 ?m to 25 ?m, and an aspect ratio of from 20 to 125.
    Type: Grant
    Filed: October 31, 2016
    Date of Patent: December 18, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihiro Kaneko, Kazumi Suzuki, Yoshitaka Yamauchi, Yu Naito
  • Patent number: 10120297
    Abstract: A liquid developer containing toner particles containing a resin binder and a pigment, wherein the toner particles are dispersed in an insulating liquid in the presence of a dispersant, wherein the resin binder contains a polyester resin P having a glass transition temperature of 35° C.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: November 6, 2018
    Assignee: Kao Corporation
    Inventors: Tatsuya Yamada, Nobumichi Kamiyoshi
  • Patent number: 10088768
    Abstract: A yellow toner that is, even in small amounts, better in reflection density and chroma than ever before. Disclosed is a yellow toner containing a binder resin and a yellow colorant, wherein, as the yellow colorant, a compound A represented by the following general formula (1) and a compound B represented by the following formula (2) are contained, and wherein, with respect to 100 parts by mass of the binder resin, a content of the compound A is from 0.5 to 7.5 parts by mass, and a content of the compound B is from 2.5 to 9.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: October 2, 2018
    Assignee: ZEON CORPORATION
    Inventor: Takuya Otake
  • Patent number: 10048605
    Abstract: Cold pressure fix toner compositions include at least one crystalline polyester having a melting point in a range from about 30° C. to about 130° C., a rosin acid-based polyester resin and an amorphous polyester having a Tg higher than the rosin acid-based polyester. The crystalline polyester can have a melting point in a range from about 30° C. to about 130° C., the rosin acid-based polyester resin can have a Tg in a range from about 0° C. to about ?45° C. and an amorphous polyester having a Tg in a range from about 40° C. to about 70° C. The temperature difference between the rosin acid-based polyester resin and the amorphous polyester resin can be in a range from about 30° C. to about 110° C.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: August 14, 2018
    Assignee: XEROX CORPORATION
    Inventors: Guerino G. Sacripante, Yulin Wang, Nan-Xing Hu, Sandra J. Gardner, Richard Philip Nelson Veregin
  • Patent number: 9977367
    Abstract: A toner includes a toner base particle including a binder resin; a release agent; and an inorganic fine particle, and an external additive. The inorganic fine particle is silica having an average abundance ratio at the surface of the toner base particle of from 70% to 90%. The toner base particle has a BET specific surface area of from 1.0 m2/g to 2.5 m2/g after the external additive is removed from the toner.
    Type: Grant
    Filed: November 1, 2016
    Date of Patent: May 22, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Satoshi Kojima, Satoshi Takahashi, Tatsuru Moritani, Shosuke Aoai, Tatsuki Yamaguchi
  • Patent number: 9946178
    Abstract: A toner for electrostatic image development includes toner particles; and an external additive containing silica particles and polytetrafluorethylene particles, the silica particles having a compression-aggregation degree of 60% or more and 95% or less and a particle compression ratio of 0.20 or more and 0.40 or less.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: April 17, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasuo Kadokura, Hiroyoshi Okuno, Satoshi Inoue, Yoshifumi Iida, Tomohito Nakajima, Yuka Zenitani, Yoshifumi Eri, Yasuhisa Morooka, Shunsuke Nozaki, Takeshi Iwanaga, Sakae Takeuchi
  • Patent number: 9910372
    Abstract: An electrostatic charge image developing toner includes: toner particles; first silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%; and second silica particles having an average circularity of 0.9 to 1.0, a particle size distribution index of 1.05 to 1.25, and a compression aggregation degree of 60% to 95%, wherein, when an average primary particle diameter of the first silica particles is set as Da (nm) and an average primary particle diameter of the second silica particles is set as Db (nm), relationships of the following Expressions (A1) to (A3) are satisfied: Expression (A1): 80?Da?120, Expression (A2): 120?Db?200, and Expression (A3): 10?Db?Da?120.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: March 6, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Moegi Iguchi, Sakon Takahashi, Takeshi Tanabe, Hiroshi Kamada, Yasuaki Hashimoto, Masaaki Usami, Yuka Zenitani, Yuta Saeki, Hiroaki Saijo
  • Patent number: 9897932
    Abstract: A toner comprising: a toner particle containing a toner base particle containing a binder resin and a colorant, and a resin particle fixed to a surface of the toner base particle; and an inorganic fine particle A, wherein the surface of the toner particle has protruded portions originating in the resin particle, an average length (D) of long sides of the protruded portions is 50 nm to 300 nm, an average Height (H) of the protruded portions is 25 nm to 250 nm, the average long-side length and the average height of the protruded portions satisfies a specific relationship, and an average value of a compactness of the inorganic fine particle A is 0.40 to 0.80, and the attachment rate of the inorganic fine particles A is 0.1% to 5.0% by area.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: February 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yojiro Hotta, Kazuo Terauchi, Tsuneyoshi Tominaga, Akane Masumoto, Takuya Mizuguchi, Motohide Shiozawa, Takeshi Naka, Masami Fujimoto, Shingo Ito, Kousuke Yamamoto, Yasukazu Ikami
  • Patent number: 9890232
    Abstract: A resin composition for forming a recording layer, includes a resin and satisfies the following Expression (1): 20° C.?T1?T10?120° C.,??Expression (1): wherein T1 represents a temperature at which the viscosity of a solid sample of the resin prepared from the resin composition, measured using a flow tester, is 104 Pa·s under an applied pressure of 1 MPa, and T10 represents a temperature at which the viscosity of a solid sample of the resin prepared from the resin composition, measured using a flow tester, is 104 Pa·s under an applied pressure of 10 MPa.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: February 13, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Yasuo Matsumura
  • Patent number: 9829820
    Abstract: The present invention is directed to providing a toner having no environmental difference in charging performance, and having high stability of images after output of a large number of copies under environments at high temperature and high humidity in a higher-speed one-component developing system, and a method for producing the toner, and the toner comprises a toner particle including a toner base particle containing a binder resin, a colorant and a releasing agent; and a resin particle adhering to the surface of the toner base particle, wherein the resin particle contains a resin A, and the resin A has an ionic functional group and an acid dissociation constant pKa of 7.0 or more and 9.
    Type: Grant
    Filed: June 19, 2015
    Date of Patent: November 28, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Akane Masumoto, Kunihiko Nakamura, Tsuneyoshi Tominaga
  • Patent number: 9791798
    Abstract: An electrostatic latent image developing toner includes a plurality of toner particles each including a core containing a binder resin and a shell layer covering a surface of the core. The shell layer contains a copolymer of at least two compounds including a compound represented by formula (1) shown below. In the formula (1), R11 represents a hydrogen atom or an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 8, and R12 represents an optionally substituted linear alkyl group having a carbon number of at least 8 and no greater than 22.
    Type: Grant
    Filed: February 17, 2017
    Date of Patent: October 17, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Haruhiro Nishitera
  • Patent number: 9785075
    Abstract: Provided is a toner containing a binder resin. The binder resin contains a crystalline resin. The toner has a maximum endothermic peak temperature (P1) of from 50° C. to 80° C. and a total endothermic amount (Q) of from 35 J/g to 90 J/g at a first temperature elevation of differential scanning calorimetry. A ratio (Qp/Q) of a total endothermic amount (Qp) of the toner in a temperature range of from 20° C. to the maximum endothermic peak temperature (P1) to the total endothermic amount (Q) of the toner is from 0.65 to 0.83.
    Type: Grant
    Filed: October 11, 2013
    Date of Patent: October 10, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Nakayama, Atsushi Yamamoto, Minoru Masuda, Susumu Chiba, Toyoshi Sawada, Hiroshi Yamashita
  • Patent number: 9751976
    Abstract: A toner binder comprising a polyester, the end of which is partially esterified with a monocarboxylic acid and/or a monohydric alcohol, the polyhydric alcohol component of which comprises a C3 alkylene glycol (a21) and an aromatic-ring-bearing diol (a22) at an (a21)/(a22) molar ratio of 5/95 to 70/30, and which has an ester group concentration of 16 to 30 wt % and satisfies a specific relationship between the ester group concentration and the hydroxy value. The toner binder combines low-temperature fixability and storage stability under high-temperature conditions or heat-temperature and -humidity conditions, and exhibits excellent durability.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: September 5, 2017
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Takashi Ono, Kazuki Sugiyama, Takaaki Bando, Yasuaki Ota, Takahiro Tanaka, Taiji Yamashita, Kakuhiro Kawaguchi
  • Patent number: 9709909
    Abstract: An electrostatic latent image developing toner includes toner particles containing a binder resin and at least one type of wax. A dispersed-phase diameter distribution of the wax has a peak at a dispersed-phase diameter in a range from 0.04 ?m to 0.20 ?m and a peak at a dispersed-phase diameter in a range from 1.0 ?m to 5.0 ?m. The wax includes first wax particles each having a dispersed-phase diameter in the range from 0.04 ?m to 0.20 ?m and second wax particles each having a dispersed-phase diameter in the range from 1.0 ?m to 5.0 ?m. A volume ratio of the first wax particles relative to the second wax particles is at least 0.5 and no greater than 1.5.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: July 18, 2017
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Seiji Kikushima
  • Patent number: 9632440
    Abstract: An emulsion aggregation toner composition includes toner particles including: an unsaturated polymeric resin, such as amorphous resins, crystalline resins, and combinations thereof; an optional colorant; an optional wax; an optional coagulant; and a photoinitiator. By optimizing the particle size of the emulsion, the aggregant concentration utilized in the emulsion aggregation process, and the solids content of the emulsion, toners may be produced capable of generating images with non-contact fusing that have high gloss.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: April 25, 2017
    Assignee: Xerox Corporation
    Inventors: Edward G Zwartz, Guerino G Sacripante
  • Patent number: 9632461
    Abstract: An image forming apparatus includes an image bearer, a toner image forming device, a nip forming device, a power source, a controller, and a temperature-and-humidity detector. The toner image forming device forms a toner image on the image bearer. The nip forming device contacts the image bearer to form a transfer nip. The power source outputs a transfer bias, in which an alternating current component is superimposed on a direct current component, to transfer the toner image onto a recording medium interposed in the transfer nip. The temperature-and-humidity detector detects a temperature and humidity. The controller controls the power source to output the transfer bias including the direct current component with a smaller absolute value as at least one of the detected temperature and humidity increases.
    Type: Grant
    Filed: December 2, 2015
    Date of Patent: April 25, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Sugiura, Toshitaka Yamaguchi, Hiroyoshi Haga, Hirokazu Ishii, Shinya Tanaka, Takehide Mizutani, Yuuji Wada, Tatsuya Ohsugi, Naohiro Kumagai, Seiichi Kogure, Junpei Fujita, Kazuki Yogosawa
  • Patent number: 9625843
    Abstract: An electrostatic image developing toner includes toner particles that contain coloring particles containing a binder resin, a coloring agent and a releasing agent. The binder resin includes an amorphous resin and a crystalline polyester resin. The toner satisfies Relations (1) and (2). ?H1 is the amount of heat absorption based on a melting peak of the crystalline polyester resin in a first heating step. ?H2 is the amount of heat absorption based on a melting peak of the crystalline polyester resin in a second heating step. ?H0 is the value of the amount of heat absorption based on a melting peak of the crystalline polyester resin in the second heating step, multiplied by the ratio of the crystalline polyester introduced in the electrostatic image developing toner. 0.43<?H1/?H0<0.95??Relation (1): 0.45<?H2/?H1<1.
    Type: Grant
    Filed: October 14, 2015
    Date of Patent: April 18, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Aya Shirai, Tatsuya Nagase, Junya Onishi, Tatsuya Fujisaki, Naoya Tonegawa, Junichi Furukawa
  • Patent number: 9557667
    Abstract: The present invention relates to a process for producing a resin particle dispersion, including a step (1) of mixing a polyester resin and a basic aqueous solution to obtain a resin neutralized product; and a step (2) of adding an aqueous medium to the resin neutralized product obtained in the step (1) to emulsify the resin neutralized product, in which a concentration of an ester group in the polyester resin is from 6.3 to 12 mmol/g, a pH of the basic aqueous solution as measured at 25° C. is from 8.5 to 13.5, and a content of an organic solvent in the resin neutralized product is not more than 10% by mass; and a process for producing a toner for development of electrostatic images, including steps of aggregating and coalescing the resin particles in the obtained resin particle dispersion.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: January 31, 2017
    Assignee: KAO CORPORATION
    Inventors: Takahiro Yoshikawa, Shoichi Murata
  • Patent number: 9557669
    Abstract: A toner, wherein the toner has glass transition temperature [Tg1st (toner)] of 20° C. to 50° C., where the glass transition temperature [Tg1st (toner)] is measured in a first heating in differential scanning calorimetry (DSC) of the toner, wherein tetrahydrofuran (THF) insoluble matter of the toner has glass transition temperature [Tg2nd (THF insoluble matter)] of ?40° C. to 30° C., where the glass transition temperature [Tg2nd (THF insoluble matter)] is measured in a second heating in differential scanning calorimetry (DSC) of the tetrahydrofuran (THF) insoluble matter, wherein the THF insoluble matter has a storage modulus at 100° C. [G?(100) (THF insoluble matter)] of 1.0×105 Pa to 1.0×107 Pa, and wherein a ratio of a storage modulus of the THF insoluble matter at 40° C. [G?(40) (THF insoluble matter)] to the storage modulus of the THF insoluble matter at 100° C. [G?(100) (THF insoluble matter)] is 3.5×10 or less.
    Type: Grant
    Filed: August 29, 2014
    Date of Patent: January 31, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinsuke Nagai, Shinya Nakayama, Tsuyoshi Sugimoto, Susumu Chiba, Kohsuke Nagata, Daisuke Asahina
  • Patent number: 9535348
    Abstract: A continuous coalescence process for preparing a sustainable toner is described which features toner with lowered melt properties and higher toner surface carbon to oxygen (C/O) ratios than previously described sustainable resins coalesced in a batch reactor.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: January 3, 2017
    Assignee: Xerox Corporation
    Inventors: David J W Lawton, Ke Zhou, Kimberly D Nosella, Melanie L Davis, Guerino G Sacripante, Richard P N Veregin
  • Patent number: 9519236
    Abstract: A reversibly allochroic toner contains a binder resin and a colorant. The colorant reversibly switches between first and second color states in response to temperature changes. The colorant exhibits a hysteresis in a temperature-color state curve thereof in which the following relationships are satisfied. Tr<TL2<TL1<TH1<TH2<Tg TH2?50° C. 20° C.?Tr?30° C. where, TH1 is a temperature at which the colorant starts to change from the first color state to the second color state, TH2 is a temperature at which the colorant completely changes to the second color state, TL1 is a temperature at which the colorant starts to change from the second color state to the first color state, TL2 is a temperature at which the colorant completely changes to the first color state, and Tg is a glass transition temperature of the binder resin.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: December 13, 2016
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Takafumi Hara, Masahiro Ikuta, Tsuyoshi Itou, Yasuhito Noda, Kazuhisa Takeda, Takayasu Aoki
  • Patent number: 9500972
    Abstract: A toner that comprises a toner particle that contains a binder resin that contains a styrene-acrylic resin and a block polymer, wherein the block polymer has a polyester segment and a vinyl polymer segment; the polyester segment is obtained by condensation polymerization of: a monomer (a) selected from a group consisting of a prescribed monomer group A; and a monomer (b) selected from a group consisting of a prescribed monomer group B, and the content in the polyester segment of the substructure originating with the monomer (b) as calculated from the following formula is from at least 1.0 mol % to not more than 30.0 mol %: {monomer (b) [mol]/(monomer (a) [mol]+monomer (b) [mol])}×100.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: November 22, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masatake Tanaka, Yoshihiro Nakagawa, Naoya Isono, Tsutomu Shimano, Shintaro Noji, Yu Yoshida
  • Patent number: 9482980
    Abstract: An image forming apparatus includes a forming unit and a transfer unit. The forming unit forms a first image using a first toner including a flat pigment containing a first metal or a first metal oxide, and forms a second image using a second toner that does not include any flat pigment containing a second metal or a second metal oxide, a maximum length of the second toner being smaller than that of the first toner. The transfer unit transfers the second image and the first image to a medium in order of the second image and the first image.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: November 1, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventor: Sho Watanabe
  • Patent number: 9442419
    Abstract: A developing apparatus and a developing method that significantly suppress generation of fogging and form a high-quality electrophotographic images under any environments such as a high temperature and high humidity environment and a low temperature and low humidity environment are provided. A toner wherein a covering rate X1 of the surface of a toner particle with silica fine particles, which is determined by ESCA, is 40.0 to 75.0 area %, and the diffusion index represented by (Expression 1) diffusion index=X1/X2 satisfies (Expression 2) diffusion index??0.0042×X1+0.62 where in the theoretical covering rate with the silica fine particles is defined as X2; and a developing apparatus including a developing carrying member which is a surface layer formed of a urethane resin having a partial structure derived from a reaction of a polyisocyanate with a compound represented by Formula 1.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 13, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuhito Wakabayashi, Masaki Yamada, Minoru Ito, Tomoya Uesugi, Michihisa Magome, Takashi Matsui
  • Patent number: 9395637
    Abstract: Incorporation of organic amines as neutralization agents in based phase inversion emulsification (PIE) processes to provide emulsification of high molecular amorphous and high molecular branch amorphous polyester resins, which are traditionally difficult to emulsify. The organic amines facilitate emulsification of these resins to achieve desired particle size with a narrow size distribution.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: July 19, 2016
    Assignee: XEROX CORPORATION
    Inventors: Yulin Wang, Shigang Steven Qiu, Ke Zhou, Karen A. Moffat, Edward G. Zwartz, Michael S. Hawkins, Paul J. Gerroir
  • Patent number: 9389527
    Abstract: An irregular shape inorganic particle satisfies the following formulas (1) and (2), 1/17?A/B? 1/13??(1) 1.2?C/D?1.5??(2) wherein A represents a distance between the center of a circumscribed rectangle, in which lines sandwiching a projected image and being parallel to an absolute maximum length of the projected image of inorganic fine particles are long sides and lines sandwiching the projected image and being perpendicular to the absolute maximum length are short sides, and the center of gravity of the projected image, B represents the absolute maximum length, C represents a length of a long side of the circumscribed rectangle, and D represents a length of a short side of the circumscribed rectangle.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: July 12, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Eiji Kawakami, Tetsuya Taguchi